CN105854351A - Super-hydrophobic porous membrane for oil-water separation and preparation method and application thereof - Google Patents
Super-hydrophobic porous membrane for oil-water separation and preparation method and application thereof Download PDFInfo
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- CN105854351A CN105854351A CN201610232770.8A CN201610232770A CN105854351A CN 105854351 A CN105854351 A CN 105854351A CN 201610232770 A CN201610232770 A CN 201610232770A CN 105854351 A CN105854351 A CN 105854351A
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- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000012528 membrane Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000926 separation method Methods 0.000 title abstract description 45
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 41
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 41
- 238000004080 punching Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 19
- 235000019198 oils Nutrition 0.000 claims description 19
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical class [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 14
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 11
- 235000011149 sulphuric acid Nutrition 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000008346 aqueous phase Substances 0.000 claims description 9
- 239000012071 phase Substances 0.000 claims description 9
- 239000001117 sulphuric acid Substances 0.000 claims description 9
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 8
- 244000137852 Petrea volubilis Species 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000003502 gasoline Substances 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 claims description 4
- 239000012266 salt solution Substances 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims 2
- 150000007522 mineralic acids Chemical class 0.000 claims 2
- 239000002253 acid Substances 0.000 abstract description 42
- 239000004698 Polyethylene Substances 0.000 abstract description 13
- -1 polyethylene Polymers 0.000 abstract description 13
- 229920000573 polyethylene Polymers 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 7
- 230000003670 easy-to-clean Effects 0.000 abstract 1
- 239000008204 material by function Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 abstract 1
- 239000010935 stainless steel Substances 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 description 31
- 238000000034 method Methods 0.000 description 10
- 235000019476 oil-water mixture Nutrition 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 150000007529 inorganic bases Chemical class 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 235000010755 mineral Nutrition 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000012047 saturated solution Substances 0.000 description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 4
- 229950000845 politef Drugs 0.000 description 4
- 238000005204 segregation Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000001045 blue dye Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- MCPLVIGCWWTHFH-UHFFFAOYSA-L methyl blue Chemical compound [Na+].[Na+].C1=CC(S(=O)(=O)[O-])=CC=C1NC1=CC=C(C(=C2C=CC(C=C2)=[NH+]C=2C=CC(=CC=2)S([O-])(=O)=O)C=2C=CC(NC=3C=CC(=CC=3)S([O-])(=O)=O)=CC=2)C=C1 MCPLVIGCWWTHFH-UHFFFAOYSA-L 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000001044 red dye Substances 0.000 description 3
- 238000004506 ultrasonic cleaning Methods 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium;hydroxide;hydrate Chemical compound [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/08—Thickening liquid suspensions by filtration
- B01D17/085—Thickening liquid suspensions by filtration with membranes
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention belongs to the technical field of functional materials, and particularly relates to a super-hydrophobic porous membrane for oil-water separation in a severe environment and a preparation method and application thereof. The preparation method comprises the steps that firstly, the surface of a clean low-density polyethylene sheet is sanded with abrasive paper to obtain a super-hydrophobic low-density polyethylene sheet; secondly, the polyethylene sheet is fixed, arrayed punching is conducted on the polyethylene sheet with stainless steel needles, and then the super-hydrophobic porous membrane for oil-water separation in the concentrated-acid, concentrated-alkaline and high-salinity environment can be obtained. The contact angle of the super-hydrophobic surface to water is 150 degrees or above, the contact angle of the super-hydrophobic surface to oil is 10 degrees or below, and the pore size and the space distance in the porous array structure are both in a hundred-micron scale. The porous membrane can be used for oil-water separation in the environment containing concentrated acid, concentrated alkaline and high salinity and is good in material stability, easy to clean, capable of being reused, free of toxic and harmful substances and environmentally friendly.
Description
Technical field
The invention belongs to technical field of function materials, particularly to preparation method and the purposes of the super hydrophobic porous film of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
Background technology
Chemical industry, especially petro chemical industry can use substantial amounts of concentrated acid, concentrated base and high level salt solution.The one side that uses of these solution has greatly facilitated the development of chemical industry, and another aspect the most easily causes the problems such as purification difficult and the environmental pollution of the burn into product of equipment.Therefore quick, the high efficiency separation that realize containing the oil water mixture of concentrated acid, concentrated base, high salt have boundless industrial prospect.
Chinese invention patent application CN1387932A, CN103893999A and CN103657156A are prepared for have hydrophobic/oleophylic function and the oil-water separating net of hydrophilic/oleophobic function respectively, although these technical schemes all have certain oil-water separation, but there is also clearly disadvantageous, such as complex process, operating difficulties, but most important shortcoming is these oil-water separating nets all (concentrated acid, concentrated base, high salt) cannot be used under severe rugged environment.Equally, document Angew. Chem. Int. Ed. 2004,43,2012；Angew. Chem. Int.
Ed. 2014, 53, 856；ACS Apply. Mater. Interf. 2009, 1, 2613；Adv.
Mater. there is above-mentioned similar problem too in the material of the oil-water separation of 2013,25,2071 reports.U.S. Patent application US2015203371A1 discloses the rustless steel that Low Density Polyethylene (LDPE) is coated with and is combined net and has the function of oil-water separation, but the LDPE that the mechanical performance of the difference that the method is limited to this composite web is i.e. coated with easily comes off on stainless (steel) wire surface, therefore develop a kind of method of (concentrated acid, concentrated base, high salt) under harsh conditions that can be stable extremely the most urgent.
Summary of the invention
One purpose of the present invention is to provide the super hydrophobic porous film of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
It is still another object of the present invention to provide the preparation method of the super hydrophobic porous film of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
Another object of the present invention is the purposes of the super hydrophobic porous film of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
The purpose of the present invention is achieved through the following technical solutions.
A kind of perforated membrane separated for liquid, wherein said perforated membrane is the porous array structure constructed on thin slice, and described thin slice has at least one super hydrophobic surface.
Preferably, described perforated membrane to the contact angle of water droplet more than 150 °, to the contact angle of oil droplet below 10 °.
Preferably, in described porous array structure, the spacing of adjacent holes is 200 ~ 500 microns.
Preferably, a diameter of 100 ~ 200 microns of the described hole in porous array mechanism.
Preferably, the thickness of described thin slice is 0.3 ~ 0.9 millimeter.
Preferably, described thin slice is Low Density Polyethylene thin slice.
A kind of preparation method according to the perforated membrane separated for liquid described in any one in above technical scheme, comprises the following steps:
Low Density Polyethylene thin slice is provided；
By clean for described Low Density Polyethylene thin slice cleaning；
Polish at described Low Density Polyethylene sheet surface with sand paper, obtain super-hydrophobic Low Density Polyethylene thin slice；
This Low Density Polyethylene thin slice is fixed,
Use stainless pin to carry out the punching of array on this Low Density Polyethylene thin slice, obtain the perforated membrane separated for liquid.
According to the purposes in liquid separates of the perforated membrane described in above technical scheme any one, wherein said liquid includes oil phase and aqueous phase, and described oil phase can be by described perforated membrane, and described aqueous phase can not pass through described perforated membrane.
Preferably, described aqueous phase includes that one or more in mineral acid, inorganic base and inorganic salt, described oil phase include one or more in normal hexane, gasoline, petroleum ether, chloroform and vegetable oil.
Preferably, described mineral acid is the concentrated sulphuric acid of 98.0%, described inorganic base be saturated sodium hydroxide solution, described inorganic salt be saturated sodium chloride solution.
The raw material of the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of the present invention is easy to get, and preparation cost is cheap, and equipment and processing technology are simple, can be used for preparing on a large scale.During the oil-water separation under carrying out severe rugged environment of the super hydrophobic porous film of the present invention, have extraordinary oil-water separation, the rate of departure is fast, efficiency is high, and low energy consumption, without other chemical assistants, reusable.The present invention is especially suitable for the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment, various concentrated acids, concentrated base, high level salt solution are had extraordinary separating effect with the oil water mixture of normal hexane, gasoline, petroleum ether, chloroform and vegetable oil etc..The material of the super hydrophobic porous film of the present invention does not contains poisonous and harmful substance, environmentally friendly, easy cleaning, repeatable utilization, good stability.
Accompanying drawing explanation
The contact angle picture of the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of Fig. 1 a. embodiment of the present invention 1 preparation.
The stereoscan photograph of the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of Fig. 1 b. embodiment of the present invention 1 preparation.
Fig. 2. the device schematic diagram of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment in the present invention.
Fig. 3. the embodiment of the present invention 1 is used for the real process photo of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
Fig. 4. the embodiment of the present invention 2 is used for the real process photo of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
Fig. 5. the embodiment of the present invention 2 is used for the real process photo of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment.
Detailed description of the invention
Present invention super-hydrophobic/super-oleophilic based on super hydrophobic material principle and the resistance to concentrated acid of low density polyethylene (LDPE) material, concentrated base, high salt and the feature of various solvent, use sand papering, the method for plasticity masterplate punching, obtain that there is quick, the super hydrophobic porous film of the oil-water separation of (concentrated acid, concentrated base, high salt) under severe rugged environment of the super hydrophobic porous film of high efficiency oil-water separating effect, the i.e. present invention.
The super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of the present invention, is the array structure constructing porous on super-hydrophobic low density polyethylene films.
The described super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment to the contact angle of water droplet more than 150 °, to the contact angle of oil droplet below 10 ° (as shown in Figure 1a).
In described porous array structure, the spacing of adjacent holes and the size in hole are hundred micro-meter scales.In described porous array structure, the spacing of adjacent holes is 200 ~ 500 microns, a diameter of 100 ~ 200 microns (as shown in Figure 1 b) in hole.Preferably the spacing of adjacent holes is 300 microns, a diameter of 150 microns of hole.
The thickness of described super-hydrophobic low density polyethylene films is 0.3 ~ 0.9 millimeter, preferably 0.5 millimeter.
Described concentrated acid be mineral acid, concentrated base be inorganic base, high salt be inorganic salt.One or more in sulphuric acid (concentrated sulphuric acids of 18.4 g/ml), nitric acid, hydrochloric acid etc. of described mineral acid, one or more in sodium hydroxide (saturated solution), potassium hydroxide, Lithium hydrate etc. of inorganic base, one or more in sodium chloride (saturated solution), potassium chloride, lithium chloride etc. of inorganic salt.
The low density polyethylene (LDPE) material under severe rugged environment in the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation of the present invention itself has the most excellent chemical inertness, is often used as the interior plug (concentrated acid, concentrated base, high salt and organic solvent) of various reagent bottle；And this material itself has hydrophobic oleophilic oil character, after rough surface, this kind of character can be strengthened, the perforated membrane therefore prepared by this material can well be applied and oil-water separation.The aperture of hundred micro-meter scales can make oil phase easily pass through the hole in perforated membrane, and aqueous phase then cannot be introduced into or by the hole in perforated membrane, in order to reaches the effect of oil-water separation.
The preparation method of the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of the present invention is:
First polish at the clean Low Density Polyethylene sheet surface of cleaning with sand paper, obtain super-hydrophobic Low Density Polyethylene thin slice；Then this polyethylene sheets is fixed, re-uses stainless pin in this polyethylene sheets, carry out the punching of array, i.e. can obtain the super hydrophobic porous film of oil-water separation under concentrated acid, concentrated base, hypersaline environment.
Described sand paper is 100 #-500 #, preferably 200 #.
The described punching carrying out array on this low density polyethylene (LDPE) film, it is that stainless pin and Low Density Polyethylene thin slice are placed in the instrument of x-y-z Three-dimensional Control System (such as: point gum machine), utilizes this instrument to make described stainless pin carry out the punching of array on Low Density Polyethylene thin slice.
Described stainless pin also can be with commercially available sewing-needle or acupuncture needle etc..
In described porous array structure, the spacing of adjacent holes and the size in hole are hundred micro-meter scales.In described porous array structure, the spacing of adjacent holes is 200 ~ 500 microns, a diameter of 100 ~ 200 microns (as shown in Figure 1 b) in hole.Preferably the spacing of adjacent holes is 300 microns, a diameter of 150 microns of hole.
The thickness of described Low Density Polyethylene thin slice is 0.3 ~ 0.9 millimeter, preferably 0.5 millimeter.
The super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment of the present invention can be used for containing concentrated acid, concentrated base, the oil-water separation of high salt.
Described containing concentrated acid, concentrated base, high salt oil water mixture in aqueous phase can be the mineral acid of various concentration, inorganic base, inorganic salt, oil phase is one or more in normal hexane, gasoline, petroleum ether, chloroform and vegetable oil.
One or more in sulphuric acid (concentrated sulphuric acids of 18.4 g/ml), nitric acid, hydrochloric acid etc. of described mineral acid, one or more in sodium hydroxide (saturated solution), potassium hydroxide, Lithium hydrate etc. of inorganic base, one or more in sodium chloride (saturated solution), potassium chloride, lithium chloride etc. of inorganic salt.
Using when the super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation carries out oil-water separation under severe rugged environment of the present invention, being fixed (as shown in Figure 2) by the super hydrophobic porous film politef flange of the present invention, super-hydrophobic surface is towards oil water mixture one side.The two ends glass tubing of flange is attached, wherein feed tube be bend pipe, curved mouth straight up, drain pipe is straight tube.Oil water mixture is placed in beaker, after magneton stirring (rotating speed is 1000 rpm) a minute, oil water mixture is poured in segregation apparatus, oil phase can pass through super hydrophobic porous film, be collected after drain pipe, and aqueous phase can not pass through super hydrophobic porous film, and it is trapped in feed tube and is collected (such as Fig. 3).This super-hydrophobic perforated membrane realizes containing concentrated acid, concentrated base, the efficiently separating of oil water mixture of high salt, and has stable oil-water separation, can be repeated several times use.
Embodiment 1.
Carrying out grinding process with the sand paper of 200 # at 0.5 millimeters thick, cleaning, clean Low Density Polyethylene sheet surface, the polyethylene sheets after polishing is placed in ultrasonic cleaning in ethanol solution, i.e. can get super-hydrophobic Low Density Polyethylene thin slice；By this polyethylene sheets together with stainless pin, it is placed in point gum machine (Nordson EFD-PicoDot, USA) in x-y-z control system, point gum machine is utilized to make described stainless pin carry out the punching of array on super-hydrophobic Low Density Polyethylene thin slice, polyethylene sheets is constructed porous array structure, and the spacing of adjacent holes is 300 microns in porous array structure, a diameter of 150 microns of hole；Then the perforated membrane obtained is taken off, i.e. obtain the contact angle to water droplet more than 150 °, to the contact angle of the oil droplet super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment below 10 °.
The oily-water seperating equipment shown in Fig. 2 is utilized to carry out oil-water separation, the super hydrophobic porous film politef flange of the present invention is fixed, super-hydrophobic surface is towards one end of feed liquor, the two ends glass tubing of flange is attached, wherein feed tube be bend pipe, curved mouth straight up, drain pipe is straight tube.Normal hexane and concentrated sulphuric acid (18.4 mol/L) mixture are placed in beaker, wherein normal hexane oil red dyes redness, concentrated sulphuric acid methyl blue dyes yellow green, after magneton stirring (rotating speed is 1000 rpm) a minute, the mixture of normal hexane Yu concentrated sulphuric acid is poured in segregation apparatus, normal hexane passes through super hydrophobic porous film, is collected after drain pipe flows out, and concentrated sulphuric acid can not pass through super hydrophobic porous film, and be trapped in feed tube and be collected, thus realize the purpose (as shown in Figure 3) of oil-water separation.
Embodiment 2.
Carrying out grinding process with the sand paper of 200 # at 0.5 millimeters thick, cleaning, clean Low Density Polyethylene sheet surface, the polyethylene sheets after polishing is placed in ultrasonic cleaning in ethanol solution, i.e. can get super-hydrophobic Low Density Polyethylene thin slice；By this polyethylene sheets together with stainless pin, it is placed in point gum machine (Nordson EFD-PicoDot, USA) in x-y-z control system, point gum machine is utilized to make described stainless pin carry out the punching of array on super-hydrophobic Low Density Polyethylene thin slice, polyethylene sheets is constructed porous array structure, and the spacing of adjacent holes is 300 microns in porous array structure, a diameter of 150 microns of hole；Then the perforated membrane obtained is taken off, i.e. obtain the contact angle to water droplet more than 150 °, to the contact angle of the oil droplet super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment below 10 °.
The oily-water seperating equipment shown in Fig. 2 is utilized to carry out oil-water separation, the super hydrophobic porous film politef flange of the present invention is fixed, super-hydrophobic surface is towards one end of feed liquor, the two ends glass tubing of flange is attached, wherein feed tube be bend pipe, curved mouth straight up, drain pipe is straight tube.Normal hexane and saturated sodium hydroxide solution mixture are placed in beaker, wherein normal hexane oil red dyes redness, sodium hydroxide saturated solution methyl blue dyes yellow green, after magneton stirring (rotating speed is 1000 rpm) a minute, the mixture of normal hexane Yu concentrated sulphuric acid is poured in segregation apparatus, normal hexane passes through super hydrophobic porous film, is collected after drain pipe flows out, and sodium hydroxide saturated solution can not pass through super hydrophobic porous film, and be trapped in feed tube and be collected, thus realize the purpose (as shown in Figure 4) of oil-water separation.
Embodiment 3.
Carrying out grinding process with the sand paper of 200 # at 0.5 millimeters thick, cleaning, clean Low Density Polyethylene sheet surface, the polyethylene sheets after polishing is placed in ultrasonic cleaning in ethanol solution, i.e. can get super-hydrophobic Low Density Polyethylene thin slice；By this polyethylene sheets together with stainless pin, it is placed in point gum machine (Nordson EFD-PicoDot, USA) in x-y-z control system, point gum machine is utilized to make described stainless pin carry out the punching of array on super-hydrophobic Low Density Polyethylene thin slice, polyethylene sheets is constructed porous array structure, and the spacing of adjacent holes is 300 microns in porous array structure, a diameter of 150 microns of hole；Then the perforated membrane obtained is taken off, i.e. obtain the contact angle to water droplet more than 150 °, to the contact angle of the oil droplet super hydrophobic porous film of (concentrated acid, concentrated base, high salt) oil-water separation under severe rugged environment below 10 °.
The oily-water seperating equipment shown in Fig. 2 is utilized to carry out oil-water separation, the super hydrophobic porous film politef flange of the present invention is fixed, super-hydrophobic surface is towards one end of feed liquor, the two ends glass tubing of flange is attached, wherein feed tube be bend pipe, curved mouth straight up, drain pipe is straight tube.Normal hexane and saturated nacl aqueous solution mixture are placed in beaker, wherein normal hexane oil red dyes redness, saturated nacl aqueous solution methyl blue dyes yellow green, after magneton stirring (rotating speed is 1000 rpm) a minute, the mixture of normal hexane Yu saturated nacl aqueous solution is poured in segregation apparatus, normal hexane passes through super hydrophobic porous film, is collected after drain pipe flows out, and saturated nacl aqueous solution can not pass through super hydrophobic porous film, and be trapped in feed tube and be collected, thus realize the purpose (as shown in Figure 5) of oil-water separation.
Claims (10)
1. the perforated membrane separated for liquid, is characterized in that: described perforated membrane is the porous array structure constructed on thin slice, and described thin slice has at least one super hydrophobic surface.
The perforated membrane separated for liquid the most according to claim 1, is characterized in that: described perforated membrane to the contact angle of water droplet more than 150 °, to the contact angle of oil droplet below 10 °.
The perforated membrane separated for liquid the most according to claim 1, is characterized in that: in described porous array structure, the spacing of adjacent holes is 200 ~ 500 microns.
The perforated membrane separated for liquid the most according to claim 1, is characterized in that: a diameter of 100 ~ 200 microns of the described hole in porous array mechanism.
The perforated membrane separated for liquid the most according to claim 1, is characterized in that: the thickness of described thin slice is 0.3 ~ 0.9 millimeter.
The perforated membrane separated for liquid the most according to claim 1, is characterized in that: described thin slice is Low Density Polyethylene thin slice.
7. a preparation method for the perforated membrane separated for liquid described in claim 1 ~ 6 any one, comprises the following steps:
Low Density Polyethylene thin slice is provided；
By clean for described Low Density Polyethylene thin slice cleaning；
Polish at described Low Density Polyethylene sheet surface with sand paper, obtain super-hydrophobic Low Density Polyethylene thin slice；
This Low Density Polyethylene thin slice is fixed,
Use stainless pin to carry out the punching of array on this Low Density Polyethylene thin slice, obtain the perforated membrane separated for liquid.
8. according to the purposes in liquid separates of the perforated membrane described in claim 1 ~ 6 any one, it is characterized in that: described liquid includes oil phase and aqueous phase, described oil phase can be by described perforated membrane, and described aqueous phase can not pass through described perforated membrane.
Purposes the most according to claim 8, it is characterized in that: described aqueous phase includes that one or more in inorganic acid solution, inorganic alkali solution and inorganic salt solution, described oil phase include one or more in normal hexane, gasoline, petroleum ether, chloroform and vegetable oil.
Purposes the most according to claim 9, is characterized in that: described inorganic acid solution is the concentrated sulphuric acid of 98.0%, described inorganic alkali solution be saturated sodium hydroxide solution, described inorganic salt solution be saturated sodium chloride solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232770.8A CN105854351A (en) | 2016-04-15 | 2016-04-15 | Super-hydrophobic porous membrane for oil-water separation and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610232770.8A CN105854351A (en) | 2016-04-15 | 2016-04-15 | Super-hydrophobic porous membrane for oil-water separation and preparation method and application thereof |
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| CN105854351A true CN105854351A (en) | 2016-08-17 |
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| CN (1) | CN105854351A (en) |
Cited By (6)
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| CN106362440A (en) * | 2016-09-30 | 2017-02-01 | 北京科技大学 | Preparation and application method of nitrocellulose membrane for efficient oil-water separation |
| CN109248570A (en) * | 2018-09-28 | 2019-01-22 | 成都其其小数科技有限公司 | A kind of preparation method of PAN/PAMS/ZnO water-oil separationg film |
| CN109396665A (en) * | 2018-11-29 | 2019-03-01 | 华中科技大学 | A method of water-oil separationg film is prepared using picosecond laser |
| CN112044283A (en) * | 2020-09-15 | 2020-12-08 | 江苏关怀医疗科技有限公司 | Porous hollow fiber membrane woven by hollow fiber yarns and preparation process thereof |
| CN113491956A (en) * | 2021-07-15 | 2021-10-12 | 河南工程学院 | LLDPE oil-water separation membrane and preparation method and application thereof |
| CN115253943A (en) * | 2022-06-22 | 2022-11-01 | 青岛大学 | Preparation method and application of super-hydrophobic low-adhesion and large-rolling-angle polyethylene micro-droplet reactor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106362440A (en) * | 2016-09-30 | 2017-02-01 | 北京科技大学 | Preparation and application method of nitrocellulose membrane for efficient oil-water separation |
| CN109248570A (en) * | 2018-09-28 | 2019-01-22 | 成都其其小数科技有限公司 | A kind of preparation method of PAN/PAMS/ZnO water-oil separationg film |
| CN109248570B (en) * | 2018-09-28 | 2021-02-23 | 刘青 | Preparation method of PAN/PAMS/ZnO oil-water separation membrane |
| CN109396665A (en) * | 2018-11-29 | 2019-03-01 | 华中科技大学 | A method of water-oil separationg film is prepared using picosecond laser |
| CN112044283A (en) * | 2020-09-15 | 2020-12-08 | 江苏关怀医疗科技有限公司 | Porous hollow fiber membrane woven by hollow fiber yarns and preparation process thereof |
| CN113491956A (en) * | 2021-07-15 | 2021-10-12 | 河南工程学院 | LLDPE oil-water separation membrane and preparation method and application thereof |
| CN115253943A (en) * | 2022-06-22 | 2022-11-01 | 青岛大学 | Preparation method and application of super-hydrophobic low-adhesion and large-rolling-angle polyethylene micro-droplet reactor |
| CN115253943B (en) * | 2022-06-22 | 2023-11-24 | 青岛大学 | Preparation method and application of superhydrophobic low adhesion and large rolling angle polyethylene microdroplet reactor |
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Application publication date: 20160817 |